Scott F, Beeby P, Abbott J, Edelman D, Boogert A
Department of Perinatal Medicine, King George V Hospital, sydney, Australia.
J Ultrasound Med. 1996 Oct;15(10):669-72. doi: 10.7863/jum.1996.15.10.669.
Most estimated fetal weight formulas have been derived and tested with larger fetuses, yet accuracy in predicting birth weight is more critical at the limit of viability. Complete data from 142 pregnancies in which delivery took place within 7 days of an ultrasonographic examination were used to create an appropriate formula for fetuses less than 1000 g and compare it with 10 currently available formulas. Our formula (In [BW] = 0.66 x 1n [HC] + 1.04 x 1n [AC] + 0.985 x 1n [FL]) was significantly more accurate than all other formulas and also performed better on a prospective cohort of 27 fetuses with estimated fetal weight less than 1000 g. Of the existing formulas, the Hadlock formula (using head circumference, abdominal circumference, femur length) was the most accurate, being significantly more accurate than all but the Woo formula with all but the Woo formula.
大多数估算胎儿体重的公式都是基于较大胎儿推导和测试得出的，然而在预测出生体重时，对于处于存活极限的胎儿，准确性更为关键。我们使用了142例在超声检查后7天内分娩的完整数据，来为体重小于1000克的胎儿创建一个合适的公式，并将其与10个现有的公式进行比较。我们的公式（ln[BW]=0.66×ln[HC]+1.04×ln[AC]+0.985×ln[FL]）比所有其他公式都显著更准确，并且在一个由27例估算胎儿体重小于1000克的胎儿组成的前瞻性队列中表现也更好。在现有的公式中，哈德洛克公式（使用头围、腹围、股骨长度）是最准确的，除了伍公式外，它比所有其他公式都显著更准确。
